of berlin



Oct. 5 1926. 1,602,167

7 H. PARKER CORE CAP Filed Feb. 18 1925 Patented Oct. 4 5, 1926.

HOWARD PAR ER, E BERLIN, NEW HAMPSHIRE, AssrGNoRmo BROWN COMPANY,

OF BERLIN, NEW HAMPSHIRE, .A ooRPorta'rIo or MAINE.

it GORE CAP.

Application filed February This invention has relation to cores or mandrels such as are used in the paper industry in winding paper thereon, and relates more particularly to the construction of the metallic caps which are employed in connection with cores or mandrels made of fibrous materials.

The object of the invention isto provide a light, sturdy and durable cap which may be. employed for reinforcing ends of such Figure 2 represents a section of the sameon the line 22 of Figure 1.

Figure 3 represents a section on the line 33 of Figure 1.

Figure etrepresents a portion of a cap provided with a reinforcing member adjacent the notch or recess therein.

Figure 5 represents a portion of a core cap and illustrates a slightly diflerent embodiment of the invention.

Figure 6 represents a section on the line 6-6 of Figure 5. i I have not deemed it necessary to illustrate in detail a complete core or mandrel, as these .instrumentalities are well known. They are made ordinarily of fibrous material in. the form of sheets of paper or other suitable fabric wound into tubular form with the convolutions cemented together, or they are made by winding a wet web of pulp in such manner as to provide a tube, the wall of which is substantially homogeneous and nonlaminated. Each end of a core such as herein described is provided with a metal cap or reinforcing end. I

In accordance with the present invention, the core. cap is made of a sheet of metal which is drawn and shaped. by suitable dies and presses to provide an inner sleeve and an outer sleeve which are connected by an integral rim or web at what may be termed 18, 1925. Serial N0. 10,051.

the outer ends thereof, the two sleeves being cylindrical and concentric. By suitable dies and presses a sheet of iron or steel is pressed and drawn soas toprovide the two thin sleevesindicated at 10 and 11 respcc- 1 ened several times its first thickness so as to afford a thick heavy rim or web as illustrated at 13 in Figure 2. Thus the resulting cap is provided with the two thin sleeves 11 and 12 and the thick compressed integral web or rim 13 which greatly increases the strength, and durability of the exposed end of the cap. The cap is then notched as indicated at 14 to receive the key or driving member of the winding apparatus by which the core as a whole is rotated. The two sleeves 10 and 11 afford an annular recess to receive the end of the core or mandrel as indicated at15 in Figure 3. Any suitable means may be utilized for interlocking the caps with the ends of the fibrous core. For example, the outer and the inner sleeves may be formed with inwardly extending projecting portions 16, 16, to constitute a key to project into a slot 17 formed in the end of the core, Ordinarily. the inner or lower end of the sleeve 10 is tapered inwardly as indicated at 18 and the end of the sleeve 11 is flared outwardly somewhat as indicated at 19 to facilitate the insertion of the end of the core into the annular recess 20 between the sleeves.

After the cap has been placed upon the end I of the core, the flaring portion 19 and the part 18 of the sleeve 10 are forced intoengagement with the wall of the core.

If desired, I may also insert into the annular recess 20 a reinforcing member such as indicated at 21 in Figure 4:. This memof the notch 14 formed in the sleeves and the web or rim 13.

In Figure 5, I have shown how the notch may be formed in the cap by swaging or forging the rim 13 downwardly so as to form the notch as indicated at 23. In this case, the metal of the web --or rim .13 is forced downwardly so as to form a wall 24 which bounds the notch, andwhich is integral not only with the web or rim 13 but also with the sleeves 10 and 11. When the cap is formed in this manner, there is further insurance against distortion of or injury to the cap due to rough handling of the completed cores or mandrels. i

As herein illustrated and described, I provide a light drawn-metal cap which is formed of sheet metal having relatively light and thin sleeves between which the'end of the core may be inserted, and a thick compacted rim or web integral with and connecting the sleeves at the outer end thereof and of such thickness as to withstand without injury the engagement of the keys or driving members which .are engaged with the notch therein,

and also to withstand the rough usage to which the cores or mandrels are subjected. Wh1le 1n some cases a reinforcing member at the notch in the cap is unnecessary,-espe-' moans? is preferably electrically welded, either by line or spot welding, to the sleeves.

What I claim is 1. A drawn sheet metal cap for cores or mandrels, comprising an inner sleeve, a concentric outer sleeve, and a thick compacted rim or web integral with and connecting the outer ends of the sleeves, said cap having a notch or recess at the juncture of the sleeves and web or rim to receive a driving member.

2. A dr wn sheet metal cap for cores or mandrels, "comprising an inner sleeve, a concentric outer sleeve, a thick compacted rim or web integral with and connecting the outer ends of the sleeves, said caphaving a notch orrece ss at the juncture of the sleeves and web or rim to receive a driving member, and a reinforcing member at said notch and located between said sleeves and welded to said sleeves,

- 3. A sheet metal cap for cores or man-- drels, comprising an inner sleeve, a concentric outer sleeve, a thick compacted rim or web integral with and connecting the outer ends of the sleeves, said cap having a notch or recess at the juncture of the sleeves and web or rim to receive a driving member, and a wall between said sleeves integral with said rim and sleeves and bounding said notch.

In testimony whereof I have afiixed my signature.

nowankn PARKER. 

